Q. What does D REF in my search results in StarPlus mean?
All books on StarPlus that are located in The Diamond are kept in the D REF sequence, which is located on the fourth floor.
D REF stands for 'Diamond Reference', as it is located in The Diamond and all books in this collection are reference-only (meaning they cannot be taken out of the building). As shown below, they have a loan policy of 'not loanable' on StarPlus.
Books in this collection are the most frequently-used textbooks or core reading for modules, and they have been made reference-only to try and make sure copies are available more often.